Separation of materials by blast sifting, especially for separating refuse for recycling, uses treatment with fluid stream from suction blast unit and additional blast treatment in dropping zone

摘要

In a method for sifting a mixture (2) of materials (or groups of materials) (2a, 2b) by applying the mixture to a first fluid flow (S) from a suction blast unit (50) so that at least part of the material (group) (2a) of lower fluid resistance is spatially separated from the other material (group) (2a) then supplying the mixture from a first transporter (40) to a dropping zone (100), the dropping zone is impacted by an additional fluid stream (S1) : An independent claim is included for corresponding apparatus (1), with the suction blast unit, transporter and dropping zone, in which a screen (120), for producing the further fluid stream, at least partially inhibits or reduces the fluid supply to the suction blast unit from outside the dropping zone.